Question: Why are coils of electric toaster Teachoo?

The resistivity of alloys is much more than the resistivity of pure metals. Also, Alloys do not burn readily even at high temperatures. For this reason, they are used in electrical heating devices like electric toasters and electric irons.

Why do electric toasters have coils?

Coils of electric toasters and electric irons made of an alloy rather than a pure metal due to the following reasons: The resistivity of an alloy is higher than the pure metal. At high temperatures, the alloys do not oxidize. Alloy does not melt readily and get deformed.

Why are the elements of electric heating devices made of an alloy rather than a pure metal?

Alloys are used in electrical heating devices rather than pure metals because the resistivity of an alloy is more than the resistivity of a pure metal. Alloys do not burn easily even at high temperatures. … Nichrome does not burn easily at high temperature i.e. it has a higher melting and boiling point than metals.

What alloy is used in iron box?

Answer: (2) nichrome

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Nichrome is used as a heating element in an electric iron . It is an 80 percent nickel and 20 percent chromium alloy with nickel and chromium.

Which material is used for making the heating coil of an electric iron?

Nichrome is an ideal material for heating elements for an electric iron also because the oxide layer formed helps to protect the inner material from oxidizing which doesn’t let internal wires burn.

Why is the element of electric heating devices made up?

Elements of heating devices are made up of alloys because : i They have high melting points. ii They have high resistance so when even a small magnitude of current passes through them they get heated up enormously.

Why are the elements of electric heating devices?

alloys are mixture of two or more metals, so they have high melting and boiling point than pure metal. Hence, elements of electric heating devices are made of alloy.

Why alloys are preferred over metals?

Alloys are, for example, generally harder than pure metals. They are made up of atoms of different sizes, rather than being uniform. … Alloys also tend to have better corrosion resistance than pure metals, and are more versatile for manipulating into different forms.

What are toaster coils made of?

A heating element in a toaster is most often a thick nichrome wire. Like most wires in any house, nichrome wire conducts electricity. But other wires are made of metals that are better conductors of electricity. That means electricity is easily passed through the wire, which can help all sorts of things work.

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Why Nichrome is used in electric iron?

It has a high melting point such that it can sustain high temperatures. Nichrome is an ideal material for heating elements for an electric iron also because the oxide layer formed helps to protect the inner material from oxidizing which doesn’t let internal wires burn.

Why are irons called irons?

The golf clubs called irons are so-called because their clubheads are made of metal. Of course, “woods” are now also made of metal, but that’s a relatively recent development. … The clubheads of irons are thin from front to back, and the clubfaces are grooved to impart spin on the golf ball.